69 visiting now: 23 USA 
22 China 
6 Netherlands 
4 Brazil 
3 France 
2 UK 
2 Hong Kong 
2 Singapore 
2 India 
1 Germany 
1 Argentina 
1 Russia 
22 China 6 Netherlands 4 Brazil 3 France 2 UK 2 Hong Kong 2 Singapore 2 India 1 Germany 1 Argentina 1 Russia